1890 .] 
525 
[Packard. 
eighth abdominal segment, while the large horn of our form is rep- 
resented by only a hump. In one of Buckler’s figures the hump of 
the green variety is almost obsolete, and the black line is wanting. 
In Buckler’s figures of the allied dictceoides there is only a hump. 
Judging by the figures none of the British species seem identical 
with ours. In Duponchel and Gruenee’s Iconographie et Histoire 
Naturelle des Chenilles, t. n, the larva is very well figured, but 
there is no horn, not even a marked lateral black line, and the hump 
is not particularly well developed. (Compare Mr. Meske’s remarks 
in the forthcoming fifth Report U. S. Entomological Commission, 
under poplar insects, where our larva is figured.) We have not 
seen other figures of the European caterpillar. 
REMARKS ON THE LARVA OF NOTODONTA STRAGULA AND 
NERICE BIDENTATA. 
A knowledge of the early stages of these forms, also of Lopho- 
donta and of Nadata is much to be desired. 
Mature larva of Notodonta stragula.*— The head is rather square 
on the sides, narrowing above, and scarcely bilobed above ; it is of 
the same general shape as in Schizura and Janassa. In this spe- 
cies instead of a single hump on the first abdominal segment, there 
is a large high soft movable hump on the second, and which nods 
backward, besides one a little stouter and shorter on the third. The 
humps are simple, with no traces of a fork, or of bristles, and they 
are both brownish, of the hue of a dead dry leaf. The very promi- 
nent hump on the eighth abdominal segment bears two slight low 
tubercles, but no bristles. The anal legs are long and slender, but 
the planta is well provided with crochets. 
It is interesting to notice that in the European forms — and in 
Europe there are more species than in North America — there is a 
tendency among the species, which vary in the number of dorsal 
humps, to fill up the gap between the genus Notodonta and Nerice. 
In fact the latter genus exists in northeastern Asia , 1 and this fact 
adds another point of resemblance between the fauna of northeast- 
ern America and northeastern Asia. 
In the European A. ziczac there are, judging by Buckler’s figures, 
as in our species, but three humps ; in A. tritophus there are four, 
while the larva of A. dromedarius most nearly approaches Nerice in 
1 Nerice davidi Oberthur, from the north of China. 
